Earnings Before Income Tax Goal Weighted Percentage

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- Definition

Net Sales Goal Weighted Percentage

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- Definition

Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Vesting Date

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- Definition

Share Based Compensation Arrangements Maximum Target

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Gross number of share options (or share units) granted during the period.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Percentage of vesting of share-based compensation awards.

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Number of new stock issued during the period.

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Stock Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees options granted	0						0
Number of shares vested							19,313
Number of Shares, Expected to Vest	19,760						19,760
Stock-based compensation	$ 1,457			$ 1,263			$ 4,235	$ 3,585
Unamortized Stock-Based Compensation	$ 6,206						$ 6,206
Remaining Weighted Average Period (years)							2 years
Performance Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Expected to Vest		77,598
Number of Shares, Granted							0	0
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested	17,591	20,313	8,800	1,065	188,400	10,100		24,312
Number of Shares, Expected to Vest				2,500				2,500
Weighted Average Grant-Date Fair Value, Granted	$ 0	$ 23.66	$ 19.97	$ 19.90	$ 17.08	$ 16.10
Stock-based compensation	$ 966			$ 635			$ 2,716	$ 2,068
Unamortized Stock-Based Compensation	$ 6,206			$ 4,475			$ 6,206	$ 4,475
Remaining Weighted Average Period (years)	2 years			1 year 2 months 12 days			2 years	1 year 2 months 12 days
Number of Shares, Granted	0	22,308	254,972	1,000	38,502	251,475
Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested	8,232		14,625		48,046
Weighted Average Grant-Date Fair Value, Granted		$ 22.69	$ 18.79		$ 15.88	$ 15.40	$ 18.74
Stock-based compensation	$ 491			$ 299			$ 1,519	$ 920
Unamortized Stock-Based Compensation	$ 2,814			$ 1,901			$ 2,814	$ 1,901
Remaining Weighted Average Period (years)	2 years			2 years			2 years	2 years
Number of Shares, Granted		3,850	122,446		7,400	121,194	130,332	128,594
Targeted performance percentage	200.00%			200.00%			200.00%	200.00%
Unvested Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized Stock-Based Compensation	$ 2,814						$ 2,814
Remaining Weighted Average Period (years)							2 years
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued by equity investee							277,280
Weighted Average Grant-Date Fair Value, Granted							$ 20.27
Common Stock \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued by equity investee								290,977
Weighted Average Grant-Date Fair Value, Granted								$ 16.24
After One Year \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Expected to Vest				1,000				1,000
Number of days of service before cliff vesting								1 year
After One Year \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of days of service before cliff vesting							178 days
After One Year \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of days of service before cliff vesting							1060 days
After Two Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of days of service before cliff vesting							3 years
After Two Year \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of days of service before cliff vesting								3 years
Share-based Compensation Award, Tranche Two \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Expected to Vest				2,500				2,500
Number of days of service before cliff vesting								2 years
Performance based stock options based upon financial performance of earnings before interest and tax ("EBIT") and net sales goal for the period commencing January 1, 2017 through December 31, 2019 \| Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares vesting based on Performance							80.00%
Earnings before income taxes goal weight, percentage							50.00%
Net sales goal weight, percentage							30.00%
Performance Based Shares Based Upon AVD Stock Price Appreciation Over the Course of the Period Commencing January 1, 2017 through December 31, 2019 \| Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earnings before income taxes goal weight, percentage							20.00%
Vested on January 6, 2019 \| Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff vesting date							Mar. 09, 2021	Feb. 08, 2020
Performance based stock options based upon financial performance of earnings before interest and tax ("EBIT") and net sales goal for the period commencing January 1, 2018 and ending December 31, 2020 \| Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares vesting based on Performance								80.00%
Earnings before income taxes goal weight, percentage								50.00%
Net sales goal weight, percentage								30.00%
Performance based stock options based upon AVD stock price appreciation over the course of the period commencing January 1, 2016 and ending December 31, 2018 \| Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earnings before income taxes goal weight, percentage								20.00%
Performance Based Shares Related to Net Income Weighted at 50%, Net Sales Weighted at 30%, Commencing January 1, 2017 and Ending December 31, 2019 \| Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted							$ 18.27
Remaining 20% of Performance Based Shares are Based Upon AVD Stock Price Appreciation for the Period Commencing January 1, 2017 and Ending December 31, 2019 \| Performance Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted							$ 15.43